>> On Thu, 24 Jun 2010 09:24:39 +0800, >> Aiza <aiz...@comclark.com> said:
A> Receiving a variable from the command line that is suppose to contain A> numeric values. How do I code a test to verify the content is numeric? The script below will work with the Bourne or Korn shell. Results for "0 1 12 1234 .12 1.234 12.3 1a a1": 0 is numeric 1 is numeric 12 is numeric 1234 is numeric .12 is numeric 1.234 is numeric 12.3 is numeric 1a is NOT numeric a1 is NOT numeric -- Karl Vogel I don't speak for the USAF or my company I place economy among the first and most important virtues, and public debt as the greatest of dangers to be feared. To preserve our independence, we must not let our rulers load us with perpetual debt. --Thomas Jefferson --------------------------------------------------------------------------- #!/bin/sh # Test an argument to see if it's numeric. Handles decimals, but # a minus sign in the regex will throw an error: "expr: illegal option". PATH=/bin:/usr/bin:/usr/local/bin export PATH case "$#" in 0) echo need an argument. ; exit 1 ;; *) ;; esac for arg do if expr "$arg" : "[0-9]*[\.0-9]*$" > /dev/null then echo "$arg is numeric" else echo "$arg is NOT numeric" fi done exit 0 _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "freebsd-questions-unsubscr...@freebsd.org"